mosfet

Hey everyone, I have a latch circuit designed for powering an ESP32. Here's how the circuit operates: when the SW6 button is pressed, it activates transistor Q6 NPN, which, in turn, opens the U1 MOSFET to power the MCU. Once the MCU boots up, it sets pin D8 to HIGH, which activates transistor...

Dear all, first, thanks for greating me in your community and sorry if I'm posting in the wrong section ! For a quick presentation, I'm from France, I'm 38, I'm an engineer in IT, mostly embedded safety SW for automotive. I've got some basics in electronics from school, but lost most of it in...

I've created a tesla coil based on the circuit shown here, and the link to the tutorial is here. The components that I've purchased are as follows: UF5402 ultrafast diode, IRFP250N MOSFET, 1 microF 305V MKP Capacitor, 2.5mm diameter primary coil, 0.405 mm secondary ciol (1000 turns), 200W...

Hi, I need some help verifying my thinking on solar panel charging of a 3.7v lithium ion battery. Long story short we are renovating our old village street light. This was originally an oil lamp and we are getting a replica made and as there is no power supply nearby are going to install a...

I'm driving a TC4420 mosfet driver IC with a PC817 optocoupler. The optocoupler tends to have slow rise and fall times and the datasheet for the mosfet driver mentions that slow rise times could end up double pulsing the mosfet. The datasheet does not show any numbers though. Datasheet...

I am making a traffic light circuit for an outreach event however I have little components. I have a working circuit using BJTs (shown below) on LTSpice however I only have signal mosfets (2N7000). I have also included the output of the BJT circuit. I am trying to adapt the circuit to work with...

Hello, I am trying to design a packed e-cell inverter topology (something similar to this). The issue is that I am accustomed to designing bipolar bias supplies for isolated gate drivers, which power conventional 3-phase full bridge inverters using either isolated DC-DC modules or transformers...

I have a vintage GPO telephone. The bell inside is circa 70V a.c. It comprises two coils (centre tapped) - effectively 2 x 35V coils. Which I want to drive with a DC pulse. I took the centre-tap as 0V and connected the two coils (with flyback diodes) to MOSFET based modules (FR120N) which are...

Hey guys, I'm looking for a circuit that generates -5V from a +5V signal from a microcontroller to open and close a depletion mode n channel-mosfet. I figured this could be done with transistors/solid-state devices but I'm stuck and would appreciate some help with this I'm looking for a...

I want to design a circuit mechanism that will amplify the input current by 6 times. The circuit must contain at least 3 MOSFETs, 1 independent source, 1 resistor. I tried but couldn't do it on ltspice. Can someone show me the circuit on ltspice ? thanks.

Hello, I am trying to understand how mosfets work and I created this theoretical configuration. Lets say I have a load with 2 n-type mosfets, one between vcc (18V) and the load and the other between the load and gnd (0V). Can I use a 5V microcontroller to keep the bottom mosfet (between load...

Hi, Build: Arduino controlled water heating tank using a 48V 12A heating element. Arduino is there to deactivate element once set temperature is reached, and to check there is water in the tank so as not to burn out element. So far I have been using chatgpt to try figure out what approach to...

Hello everybody.I have to implement the in house circuit cc-ih circuit which is an energy harvester circuit using simscape electrical. The description of the circuit can be found on page 7 of the pdf at Finite element-based assessment of energy harvesting in composite beams with piezoelectric...

I am a complete beginner at designing circuits and my English sounds like a 5-year-old talking. So, please beer with me. I was thinking of building an aquarium light. As plants need a full spectrum of light to grow properly, this is the selection of colours I came up with by watching many...

Hi a band colleague smoked his roland 60w blues amp and every forum informs you Roland are not interested in supplying a sm power supply or diagram. The fuse is blown 33 ohms resistor smoked 2 x irf 740s bought to replace The other two are [on] Aff 51 U1620rg kak Does anyone have an...

Hello all, Disclosure, I am an electrical engineer but I deal with designing power system for construction projects. I decided to go back for Masters in Power Electronics. I'm rusty with DC circuits. My homework is the same as a previous thread...

Is it okay if the half-bridge switching circuit draws up to 100mA from the power supply at 20kHz because of the RC-snubber between the MOSFETs' drain and source? Without the snubber parts, there's no noticeable current draw, but there are many spikes in the output.

I'm currently encountering difficulties in testing my MOSFETs. I am in the process of designing a snubber for an IRF840 operating at 20kHz. Upon attempting to test (drive) the MOSFET, at <= 50% duty, in its basic state without any additional circuitry, I observed a 4V voltage drop from the 12V...

Hi! I am working on a university project. We are building a vehicle similiar to the BattleBots competition. Everything is working well but I have a problem with a 12 VDC motor controlled with transistor/MOSFET. I am using this motor water pump...

Good day everyone, so I have a problem with my two switch forward converter. As soon as the current increases at the input from around 200mA a transient/spike starts appears at both the turn-on and turn-off of Vgs. The higher I go and push it the bigger the spikes ultimately get, which is...